Problem with Combobox and focus

Question

Hi All,

In my form i have a grid with three CheckBox columns and a single row.

Next control to Grid is a ComboBox.

Initially when form is loaded, focus is set to first cell in the grid. Once I check the CheckBox (either by space bar or by mouse click ), the focus moves to the combo box which is undesired. The focus should not move to ComboBox.

Please provide me some pointers to handle this issue.

Thanks in advance.